1251 results about "Feed pump" patented technology

The invention relates to the technical field of oxytetracycline hydrochloride conveying, in particular to an oxytetracycline hydrochloride airflow conveyor which comprises an airflow feeding pump, an inner pipe discharging mechanism arranged on the airflow feeding pump, an outer pipe resonance mechanism arranged in the inner pipe discharging mechanism and a powder distributing and conveying mechanism arranged on the outer pipe resonance mechanism. And the air flow feeding pump is used for providing air flow kinetic energy for transferring the powdery oxytetracycline hydrochloride. An independent airflow feeding pump is arranged on a path for preparing oxytetracycline hydrochloride of a powder rotating roller, when the airflow feeding pump operates, constant-pressure airflow released outwards passes through an inner pipe discharging mechanism, thrust applied by part of air pressure can bear a pressure gasket to vibrate at high frequency along with transmission of part of airflow into a vibration bin assembly, and therefore the effect that oxytetracycline hydrochloride is subjected to high-frequency vibration is achieved. And finally, the inner pipe clamped by the plurality of pressure-bearing gaskets can continuously release the airflow outwards in a corrugated state, so that the loss of the powdery oxytetracycline hydrochloride on the pipe wall due to standing can be avoided.

The invention relates to the technical field of multi-energy complementary power generation, and discloses an industrial steam supply peak shaving system and method coupling fused salt heat storage and solar energy, and the industrial steam supply peak shaving system comprises a coal-fired power generation system and an industrial steam supply system; in the heat storage mode, the boiler, the steam cooler and the condenser are sequentially connected; in the heat release mode, the high-pressure heater, the primary feed water heater and the low-pressure cylinder are sequentially connected through pipelines; and the feed pump, the secondary feed water heater and the boiler are connected in sequence. In the low ebb of the electrical load, solar energy is used for heating fused salt to store heat, and part of high-temperature steam is extracted from steam-water circulation of the improved coal-fired power generation system to store the heat in a heat storage device and does not enter a steam turbine for power generation; the power load output is adjusted by adjusting the thermal load output of the thermodynamic system in the power generation process, and load decoupling of the boiler and the steam turbine is achieved. And in the electrical load peak, the stored heat energy is released back to steam-water circulation, and the electrical load of the coal-fired power generation system is increased.

The invention relates to a low-energy-consumption sludge high-dryness dehydration low-temperature drying system and a control method thereof. A hydraulic high-pressure feeding pump is used for conveying conditioned sludge from a sludge tank to an ultrahigh-pressure double-diaphragm low-temperature drying all-in-one machine; in the ultrahigh-pressure double-diaphragm low-temperature drying all-in-one machine, heat energy is provided for the ultrahigh-pressure double-diaphragm low-temperature drying all-in-one machine through an electromagnetic heating device; meanwhile, a vacuum pump is started, water vapor generated in the dehydration process is pumped out by the vacuum pump and cooled through a condenser, and heat is recycled; and the dehydrated dry sludge is conveyed to a dry material bin for storage through a screw conveyer. The energy consumption can be obviously reduced, and the sludge dewatering efficiency can be improved; meanwhile, through automatic control and an optimized operation mode, the stability and continuity of sludge treatment are improved, manual intervention is reduced, and the treatment effect and the operation safety are ensured.

The invention relates to a method for continuously producing 1, 1, 1, 3-tetrachloropropane, which comprises the following steps: adopting a loop reactor in which a beam pipe is arranged in the reactor, mixing reaction raw materials ethylene and carbon tetrachloride at a Venturi nozzle at the lower part of the reactor through a gas circulation loop and a liquid circulation loop outside the reactor, and spraying into the reactor filled with a main catalyst. A cocatalyst and a chelating agent are added into a carbon tetrachloride raw material in advance, are pumped into a liquid loop by a feeding pump and then enter a reactor. Reaction raw materials are circularly stirred under the action of a beam pipe in the reactor, so that solid, liquid and gas phases are fully mixed. By adopting the method disclosed by the invention, the selectivity and the production efficiency of the 1, 1, 1, 3-tetrachloropropane can be greatly improved, and the method also has the advantages of simplicity in operation, environment friendliness, long service life of the catalyst and low cost.

The invention discloses a double-medium thermochemical energy storage system and method. The double-medium thermochemical energy storage system comprises a first regulating valve, a gas storage tank, a thermochemical reactor, a fan, a steam pocket, a water feeding pump and a circulating water pump, the first regulating valve is communicated with an inlet of the gas storage tank through the fan and the electric heater, an outlet of the gas storage tank is communicated with an inlet of a heat exchange tube in the thermochemical reactor, an outlet of the heat exchange tube in the thermochemical reactor is divided into two paths, one path is communicated with an inlet of the fan, and the other path is communicated with a shell side inlet of the steam pocket; a bottom outlet on the shell side of the steam drum is communicated with an inlet of the circulating water pump after being combined with an outlet of the water feeding pump through a pipeline, an outlet of the circulating water pump is communicated with an inlet of a heat exchange pipe in the thermal chemical reactor, a shell side outlet of the thermal chemical reactor is communicated with the pipe side of the steam drum, and a pipe side inlet of the thermal chemical reactor is communicated with a drainage pipe. According to the system and the method, the heat exchange efficiency of the thermochemical reactor can be improved.

The invention discloses a preparation method of aluminum nitride by spray granulation, which belongs to the technical field of ceramic preparation. The method comprises: adding aluminum nitride powder and a dispersant into a ball mill for ball milling for 24 to 26 hours, adding an adhesive and a solvent thereto, wherein the adhesive is acrylic resin or PVB, and continuing ball milling for 15 to 18 hours after the adhesive and the solvent are added, the ball milling speed of the ball mill is set to 100 to 200 rpm, the diameter of the ball milling beads is 20 to 50 mm, the number of the ball milling beads is 200 to 300, and aluminum nitride slurry is formed after ball milling; the aluminum nitride slurry is sucked into a granulation tower, and the parameters of the granulation tower are set to: an air inlet temperature of 130 to 140 DEG C, an air outlet temperature of 80 to 90 DEG C, a rotation speed of an atomizing disk of 7000 to 8000 rpm, and a feed pump rotation speed of 50 to 60 rpm; collecting samples at a discharge port of the granulation tower, and then testing the samples and recording the test results.

The invention relates to a cooling and lubrication system (13) comprising a pump unit (35), a collection tank (20), and a dry sump (31), wherein the pump unit (35) functionally comprises at least one bilge pump (33, 34) and one feed pump (45). The at least one bilge pump (33, 34) is connected to the dry sump (31) on one suction side (37, 38) and to the collection tank (20) on one pressure side (41, 42), whereas the feed pump (45) is connected to a suction line (22) on one suction side (46), which is connected to the collection tank (20). Furthermore, a supply line (15) and a switching valve (49) are provided, the latter having a first working port (54), a second working port (53), and a third working port (52).The first working port (54) of the switching valve (49) is connected to the suction line (22), the second working port (53) of the switching valve (49) to a pressure side (47) of the feed pump (45), and the third working port (52) to the supply line (15). In the first switching position of the switching valve (49), the second working port (53) is connected to the first working port (54) and disconnected from the third working port (52), whereas in the second switching position of the switching valve (49), the second working port (53) is connected to the third working port (52) and disconnected from the first working port (54).

The invention belongs to the field of polycrystalline silicon preparation, and particularly relates to a technology and system for preparing monosilane through fixed bed catalytic cracking of polycrystalline silicon high-boiling residues, the system comprises a feeding unit, a reaction unit and a condensation recovery unit which are connected in sequence, the feeding unit comprises a storage tank, a feeding pump and a preheating mixer which are connected in sequence, and the reaction unit comprises a reaction unit and a condensation recovery unit which are connected in sequence. The preheating mixer is also connected with a hydrogen feeding pipeline, the reaction unit is a fixed bed catalytic reactor filled with a catalyst, and the condensation recovery unit comprises at least one stage of cooler and a recovery tank. By adopting the system, the process disclosed by the invention has the advantages of extremely simple process, high yield, capability of realizing long-term, continuous and stable production, environmental friendliness, easiness in material separation, high conversion rate, good target product selectivity and high trichlorosilane content in a final product.

The utility model discloses a quick graded filtering device for fermentation liquor, which belongs to the technical field of fermentation liquor filtering and comprises a stock solution tank, the bottom of the stock solution tank is connected with one end of a first liquid guide pipe, the other end of the first liquid guide pipe is connected with the input end of a graded filtering module, and a feeding pump and a first feeding valve are arranged on the first liquid guide pipe. The output end of the grading filtering module is connected with one end of the second liquid guide pipe, and the other end of the second liquid guide pipe is connected with the sterile liquid storage tank; when the device starts to work, a first feeding valve and a feeding pump are opened, fermentation liquor in a stock solution tank is introduced into a grading filtering module through a first liquid guide pipe, and the fermentation liquor subjected to grading filtering through the grading filtering module enters a sterile liquid storage tank to be stored through a second liquid guide pipe; the device can effectively overcome the defects of low efficiency, poor separation effect, easiness in blockage of a filter membrane, time and labor waste and the like through methods of graded filtration, cross-flow filtration and the like, does not need to be matched with a centrifugal machine, treats in one step, and lays a foundation for producing sterile products.

The invention discloses a coal mill unbalanced data fault diagnosis method based on a Bayesian network, and belongs to the field of generalized zero sample fault diagnosis of a thermal power generation feed pump set. Aiming at the problems of unbalanced fault data distribution, difficult minority class fault diagnosis and poor result interpretability in an industrial scene, sample distribution is collaboratively optimized through SMOTE data enhancement and Dirichlet prior smoothing, a three-layer causal topology network of'fault layer-attribute layer-observation layer 'is constructed, expert knowledge constraint and data-driven learning are combined, and the fault layer-attribute layer-observation layer-based fault diagnosis method is established. High-precision fault classification is realized; a dual-mode diagnosis mechanism is designed, fault node direct inference and attribute node indirect inference are synchronously supported, and explainable physical-level diagnosis guidance is provided while the fault diagnosis accuracy is guaranteed. The method is successfully applied to a coal mill system of a coal-fired unit, and can be expanded to transparent intelligent operation and maintenance of complex industrial equipment.

The invention belongs to the technical field of functional sugar alcohol hydrogenation, and particularly relates to a system and a method for intelligently controlling a reaction kettle in a functional sugar alcohol hydrogenation process. Comprising a temperature sensor TT, a pressure sensor PT, a liquid level sensor LT, a hydrogen concentration sensor TZT and a spectrum sensor, and the sensor networks are arranged on a reaction kettle body, a feeding pipeline, a condenser and a hydrogen recovery device. The device is used for collecting temperature, pressure, liquid level and hydrogen concentration in the reaction kettle and spectral data of an outlet sugar alcohol product in real time. The control execution layer comprises a PLC (Programmable Logic Controller), a dynamic valve controller, temperature control equipment and a stirrer speed regulation module; and the dynamic valve controller is connected to the hydrogen supply pipeline and the feeding pump. The hydrogen flow, the temperature and the stirring speed are adjusted in real time through AI dynamic optimization, the sugar alcohol conversion rate is increased to 5%, and the conversion rate fluctuation range is reduced to + / -0.5%.

The invention relates to the technical field of electrical performance testing, in particular to a power station auxiliary machine fault diagnosis method and system oriented to a smart factory, and the method comprises the steps: obtaining a current sequence, a power sequence and a vibration sequence of a boiler feed pump; equally dividing the collection duration into a plurality of time periods, and determining the abnormal vibration value of the boiler feed pump in each time period; determining trend noise significance of the power sequence and the current sequence in each time period; determining a current power influence value of each time period based on the trend noise significance, the correlation between the current sequence and the power sequence in each time period and the distribution condition of power data; and based on the dispersion degree of the difference between the vibration abnormal value and the current power influence value and the distribution range of the vibration abnormal value, determining the load vibration difference of the boiler feed pump, and performing fault diagnosis on the boiler feed pump. The invention aims to improve the accuracy of fault diagnosis of the boiler feed pump.

The invention relates to the technical field of automatic control, in particular to a water quality control method and system for a through-flow boiler. The method comprises the following steps: collecting a liquid sensing signal and a temperature sensing signal in the through-flow boiler; performing preliminary liquid resistance value calculation processing according to the liquid sensing signal to generate preliminary liquid resistance value data; performing liquid resistance value correction processing of temperature compensation on the initial liquid resistance value data based on the temperature sensing signal to generate liquid resistance value data; water feeding operation of a water feeding pump of the through-flow boiler is executed; performing instant liquid conductivity and dissolved solid concentration analysis processing on the liquid resistance value data according to the water supply operation of the water supply pump to respectively obtain an instant liquid conductivity signal and instant dissolved solid concentration data; and according to the instant liquid conductivity signal and the instant dissolved solid concentration data, pollution discharge control operation of the through-flow boiler is executed. By analyzing the water quality characteristics of the through-flow boiler, intelligent and efficient water quality pollution discharge control is realized.

The invention provides a pipeline flow monitoring device for perfluorotripropylamine production. According to the pipeline flow monitoring device, the association rule of the scaling thickness and the feeding flow fluctuation is analyzed by obtaining the scaling image of the inner wall of the pipeline, extracting features and calculating the scaling thickness and combining with a prediction model trained by historical data. And judging whether the pipeline needs to be cleaned or not according to the predicted flow fluctuation condition. Meanwhile, feeding pressure and flow are monitored in real time, the change trend is analyzed, and the rotating speed of the feeding pump is adjusted in time. In addition, spectrum analysis is carried out on the flow fluctuation data, and whether the scaling risk exists or not is judged.

The invention discloses a method and system for monitoring the health state of a water delivery pump group based on a graph neural network, and the method comprises the following steps: collecting the multi-modal data of the water delivery pump group, the multi-modal data comprising sound data and vibration data; preprocessing the multi-modal data, and constructing a training data set; training a preset graph neural network model based on the training data set to obtain a water delivery pump group health state monitoring model; and the real-time multi-modal data of the water feeding pump set is input into the water feeding pump set health state monitoring model, the health state of the water feeding pump set is predicted, and the accuracy of the model is improved.

The invention discloses a once-through furnace water supply system coupled with a steam feed pump set and a hydraulic turbine booster pump set and a control method. Compared with a conventional once-through furnace water supply system, the once-through furnace water supply system is coupled with a full-flow water supply bypass system comprising a water supply bypass header, the hydraulic turbine booster pump set, a water storage tank and other equipment; the device is put into use during deep peak regulation of the once-through furnace. Detailed control strategies are elaborated on the basis and include control methods of the full-flow water supply bypass system in different stages of commissioning, dry-wet state conversion and the like. According to the method, the economical efficiency and the adjusting performance of the direct-current furnace during deep peak shaving are improved, the inlet flue gas temperature and the denitration efficiency of the SCR denitration system can be increased by improving the dry-wet state conversion load point of the direct-current furnace, and the environment-friendly performance of the direct-current furnace during deep peak shaving is improved.

The invention belongs to the field of plant extracting solution concentration, and discloses a low-pressure high-power concentration device for a plant extracting solution and a concentration method using the low-pressure high-power concentration device. The device is based on a series reverse osmosis membrane stack and a feeding pump, a fresh water collecting tank, a booster pump, three types of pressure sensors, two types of osmometers, a water inlet pressure control system and a one-way valve are additionally arranged, the three types of pressure sensors are used for detecting the pressure of a feeding header pipe, the pressure of concentrated water and the pressure of a fresh water header pipe respectively, and the two types of osmometers are used for detecting the osmotic pressure of the feeding header pipe and the osmotic pressure of the concentrated water respectively. The water inlet pressure control system adjusts the design pressure of the device and the osmotic pressure of the plant extracting solution by adjusting the frequencies of the booster pump and the feeding pump, so that accurate monitoring of parameters is realized, efficient concentration of the plant extracting solution under low pressure is guaranteed, scaling on the surface of a reverse osmosis membrane is delayed, the service life of a membrane stack is prolonged, and continuous production of membrane concentration and filtration is realized.

The utility model discloses a feed pump core cladding protection system which comprises a circulating fluidized bed boiler, an outlet of the circulating fluidized bed boiler is communicated with an inlet of a steam turbine, an outlet of the steam turbine is communicated with an inlet of a condensate pump, and an outlet of the condensate pump is respectively communicated with an inlet of a slag cooler and an inlet of a booster pump. An outlet of the slag cooler is communicated with an inlet of the water feeding pump through a low-pressure heater and a deaerator in sequence; the booster pump outlet is communicated with the feed pump inlet; the outlet of the high-pressure heater is communicated with the inlet of the circulating fluidized bed boiler. According to the system, a bypass is additionally arranged beside a pipeline, leading to sealing water of a feed pump, of a condensate pump, a booster pump is additionally arranged on the bypass, and the pressure of condensate entering the feed pump seal is adjusted. The lowest pressure of the outlet of the condensate pump is set, once the pressure is smaller than the minimum pressure required by a sealing system, the booster pump is started immediately, stable condensate pressure is guaranteed, a water pump core bag is prevented from being damaged, and safe operation of a unit is guaranteed.

The invention belongs to the technical field of thermal power generation control, and particularly discloses an automatic control method for tripping of a high-pressure heater drain pump of a thermal power generating unit, which comprises the following steps: step 1, gradually reducing the coal quantity of the thermal power generating unit according to a preset first rate, and enabling the thermal power generating unit to run in a sliding pressure manner in a steam turbine tracking manner; 2, the real-time coal quantity of the thermal power generating unit is obtained, the total air volume and the primary air pressure are regulated and controlled according to the real-time coal quantity, meanwhile, the locking preset time of boiler core equipment of the thermal power generating unit is regulated and controlled, and the operation number of a coal pulverizing system is regulated and controlled; 3, the feed water flow of a feed pump, the pressure of a condensate pump, main steam parameters of a steam turbine and the final-stage high-pressure heater liquid level are regulated and controlled; and 4, whether the unit load, the feed water flow, the main steam parameters and the final-stage high-pressure heater liquid level meet the control ending conditions or not is judged in real time, and if not, the step 2 to the step 4 are repeated. According to the method, the non-planned shutdown frequency can be remarkably reduced, and the operation reliability and safety of the thermal power generating unit are greatly improved.

The utility model relates to the field of PVC (polyvinyl chloride) reflective film production, in particular to a batching device for ultra-transparent high-elastic PVC reflective film production, which comprises a base and a mixing mechanism, a mixing mechanism used for resin mixing is arranged on the rear side of the top of the base and comprises a motor, a stirring tank and a connecting shaft double propeller, the stirring tank is fixedly connected to the right side of the top of the base, a sealing cover is fixedly connected to the left side of the stirring tank, the motor is fixedly installed in the middle of the left side of the sealing cover, and an output shaft of the motor penetrates through the inner side of the sealing cover and extends into the stirring tank. And output shafts of the motors are fixedly connected with coupled twin propellers. Through cooperation of the mixing mechanism and the batching mechanism, ingredients and raw materials are accurately put into the material storage box and then conveyed to the stirring tank through the material pump; the motor drives the connecting shaft double propellers to rotate and rotate, meanwhile, the heating pipe heats, efficient and uniform mixing of ingredients is achieved, and the problem that mixing is not uniform easily when a single mixing hopper is used for mixing the ingredients is solved.

A desalination system includes a watertight tank built into a barge to house reverse-osmosis tubes and flooded with cooling water or fluid a closed-loop water or a fluid circulation system that circulates water or fluid inside the watertight tank to cool the reverse-osmosis tubes and transfer the heat to a seawater radiator mounted on the exterior of the barge to cool the cooling water or fluid; a reverse-osmosis system consisting of a seawater feed pump sucking in seawater through wedge wire screens attached to an inlet or inlets in the hull of the barge, and pumping that water into a plurality of reverse-osmosis tubes housed within the watertight tank and configured to process the seawater passing through the reverse-osmosis membrane to freshwater water stream and a brine water stream; and a high-density polyethylene (HDPE) pipeline.

The utility model discloses a caulking device for building decoration, which relates to the field of building decoration and comprises a shell, a stock bin and a water storage bin are respectively arranged in the shell, a partition plate is arranged between the upper portion of the stock bin and the water storage bin, two sides of the partition plate are connected with sliding blocks, a sliding groove is arranged on the surface of the inner side of the shell, and the sliding blocks are matched with the sliding groove in a sliding mode. The upper end of the partition plate is connected with a flow guide pump, the output end of the flow guide pump is connected with a flow guide pipe, the flow guide pipe is of a telescopic structure, the bottom end of the shell is connected with a joint filling pipe, the joint filling pipe is of a telescopic structure, one end of the flow guide pipe is connected with the joint filling pipe, the inner bottom face of the stock bin is connected with a material guide pump, and the output end of the material guide pump is connected with a discharging pipe. The flow guide pipe and the flow dividing pipe are led out of the water storage bin, the flow dividing pipe is used for injecting a water source into the stock bin and helping filler to be mixed and formed and can serve as a cleaning water source in the stock bin, the flow guide pipe is directly connected with the joint filling pipe, the joint filling pipe is cleaned at any time, and the pipeline is kept unblocked.

The invention discloses a continuous kettle type nitromethane production process, and relates to the technical field of basic chemical raw material synthesis and flow chemical reaction process control, which comprises the following steps: quantitatively and continuously pumping a temperature-regulated sodium nitrite mixed solution into a raw material mixer in a closed-loop automatic control mode through a variable-frequency feeding pump matched with a mass flow meter; synchronously, quantitatively and continuously pumping dimethyl sulfate into the raw material mixer in a closed-loop automatic control manner by matching a feeding pump with a stop valve and a mass flow meter, and uniformly mixing the two raw materials in the raw material mixer according to the stoichiometric molar ratio of the dimethyl sulfate to the sodium nitrite, according to the tandem type segmented design, each reaction kettle can be subjected to customized temperature field control and heat transfer design specially aiming at the special thermodynamic and dynamic requirements of the reaction stage where the reaction kettle is located, the heat transfer efficiency of the whole system is greatly improved, and due to the fact that reaction heat is taken away timely and accurately, the heat transfer efficiency is greatly improved. And a by-product generation path induced by local abnormal high temperature is effectively restrained.

The invention provides a steam turbine generator unit feed pump net positive suction head detection system and method, relates to the technical field of net positive suction detection, and solves the technical problem that net positive suction is difficult to recognize in advance in the prior art. The system specifically comprises a temperature acquisition module used for acquiring the temperature of the deaerator; the judgment and early warning module is used for receiving the flow change rate of the feed pump and triggering alarm when the flow change rate exceeds a flow threshold value; the effective net positive suction head calculation module is used for converting the inlet pressure of the water feeding pump into absolute pressure; temperature correction is conducted on the temperature of the deaerator to obtain the saturation temperature of an inlet of the water feeding pump, the saturation temperature is converted into saturated vapor pressure, and the effective net positive suction head is calculated based on the absolute pressure and the saturated vapor pressure; the necessary net positive suction head obtaining module is used for calling the necessary net positive suction head table and calculating and obtaining the necessary net positive suction head; and the net positive suction head calculation module is used for receiving the effective net positive suction head and the necessary net positive suction head and calculating the net positive suction head. The device is used for detecting the net positive suction head.

The invention relates to a device and method for controlling a lubricating oil interruption test of an aero-engine, and the device comprises a valve assembly which is communicated with an oil supply pump of the aero-engine to be tested; and a controller electrically coupled to the valve assembly, the controller for: causing the valve assembly to supply gas to the oil feed pump to initiate a grease interrupt test; when the lubricating oil interruption duration is close to the lubricating oil interruption duration set value, the valve assembly supplies gas to the oil supply pump and compensates the oil supply pump with lubricating oil at the same time; and when the lubricating oil interruption duration reaches the lubricating oil interruption duration set value, the valve assembly supplies the lubricating oil and stops supplying the gas.

According to the technical scheme, the net cage is characterized by comprising a floating platform assembly, a net bag, a fixing assembly and a feeding assembly, the floating platform assembly comprises an annular floating plate, a supporting frame is fixed to the inner side of the floating plate, the feeding assembly comprises a mounting frame, the mounting frame is rotationally connected with the supporting frame, a rotating mechanism is connected to the mounting frame, and the rotating mechanism is connected with the net bag; the floating plate is provided with a mounting frame, a discharging hopper is arranged in the mounting frame in a sliding mode, the discharging hopper is connected with the moving mechanism and can slide in the radial direction of the floating plate, the floating plate is provided with a feeding pump, the mounting frame is connected with an adapting column, the adapting column is connected with a conveying pipe in a rotating mode, the conveying pipe is connected with the feeding pump, the adapting column is connected with a discharging pipe, and the discharging pipe is connected with the discharging hopper. The device has the functions that feed can be evenly fed into the net cage conveniently, and the survival rate is increased.

The invention provides a method for producing methyl pentamethylene diamine and methylpiperidine through hydrogenation of methyl glutaronitrile, and belongs to the technical field of chemical engineering. Comprising the following steps: a mixed solution of 2-methylglutaronitrile and a hydrogen-dissolving solvent passes through a feeding pump and a preheater, and enters the lower part of a pipeline reactor together with a liquid-solid phase mixed material from a high-pressure circulating pump, hydrogen enters a gas distributor at the bottom of the pipeline reactor, and a formed gas-liquid-solid three-phase material is subjected to a catalytic hydrogenation reaction in a rising process from the bottom of the pipeline reactor; carrying out gas phase separation; unreacted hydrogen is circulated; and liquid-solid materials at the bottom of the high-pressure gas-liquid-solid phase separator are returned to the pipeline reactor through the high-pressure circulating pump. A middle produced liquid phase is sent to a low-pressure liquid-solid phase separator through pressure reduction, a catalyst separated at the bottom is recovered to a catalyst preparation system, the middle produced liquid phase enters a hydrogen-dissolving solvent recovery tower, a hydrogen-dissolving solvent recovered at the tower top is sent back to a raw material tank, and a product is obtained at the tower bottom. The method is more stable, reaction and separation equipment are small in size, and the production capacity is high.

The invention belongs to the technical field of heat pump rectification, and particularly relates to a double-effect heat pump rectification system which comprises a first-effect rectification tower feeding pump connected with a preheater, the preheater is connected with a first-effect rectification tower, the first-effect rectification tower is connected with a gas-liquid separator through a screw compressor, and the gas-liquid separator is connected with a tail gas condenser through a second-effect falling film reboiler. The second-effect falling film reboiler is connected with a first-effect reflux discharge pump through a first-effect reflux tank, and the first-effect reflux discharge pump is connected with the preheater; the first-effect rectifying tower is respectively connected with a first-effect falling film reboiler and a first-effect falling film circulating pump; the first-effect rectifying tower is connected with a second-effect rectifying tower through a first-effect tower kettle discharging pump; the first-effect falling film reboiler is connected with a second-effect reflux discharge pump through a second-effect reflux tank; the second-effect falling film reboiler is connected with a second-effect falling film circulating pump and a second-effect rectifying tower, the second-effect falling film reboiler is connected with a second-effect rectifying tower kettle discharging pump through the second-effect rectifying tower, and the second-effect rectifying tower is connected with the first-effect falling film reboiler. According to the invention, double-effect rectification and heat pump rectification are successfully combined, and the cost is low.

The invention discloses an agricultural spraying device for agricultural planting, and relates to the technical field of agricultural planting, the agricultural spraying device comprises a bottom plate and further comprises a mixing box arranged above the bottom plate, the top of the mixing box is fixedly connected with a transmission box, a transmission assembly is arranged in the transmission box, a stirring assembly is arranged in the mixing box, and a batching assembly is arranged on one side of the mixing box; the bottom of the mixing box is fixedly connected with a feeding pump, the discharging end of the feeding pump is fixedly connected with a mounting pipe, the bottom of the mounting pipe is fixedly connected with a guide box, one side of the mounting pipe is fixedly connected with a detection cylinder, a pressure detection assembly is arranged on one side of the detection cylinder, and an alarm assembly is arranged on the bottom plate on one side of the pressure detection assembly. A lifting spraying pipe is arranged on one side of the discharging end of the material guiding box, lifting adjusting assemblies are arranged on the two sides of the lifting spraying pipe, a swing spraying assembly is arranged above the lifting spraying pipe, a telescopic pipe is fixedly connected between the lifting spraying pipe and the material guiding box, and the device is wider in spraying range, more flexible to use and higher in safety.

The utility model relates to an ammonium phosphate evaporation and concentration system and belongs to the field of chemical engineering. The system comprises a concentrated ammonium phosphate pump, a concentrated ammonium phosphate storage tank, an I-effect evaporation chamber, an I-effect heater, an I-effect circulating pump, an I-effect charging pump, an II-effect evaporation chamber, an II-effect heater, an II-effect circulating pump, an II-effect charging pump, an III-effect evaporation chamber, an III-effect heater and an III-effect circulating pump. By adopting the system and the method, low-pressure saturated live steam is utilized to indirectly heat dilute ammonium phosphate to generate secondary steam and tertiary steam to continuously heat the dilute ammonium phosphate to produce concentrated ammonium phosphate. Compared with a two-effect evaporation concentration process flow which is widely used at present, the three-effect countercurrent evaporation concentration process flow saves energy by 47%. The utility model aims at saving energy, reducing consumption, reducing carbon emission of a production device and protecting the environment.